Lock



L. B. SHINN June 6, 1933.

LOCK

Filed June 22, 1931.

Patented June 6, 1933 mvrrnn4 STATES Param ries LYLE B. sHINim OF CHICAGO,` ILLINOIS, ASSIGNOR '10` CHICAGO LOCK COMPANY, OF l CHICAGO, ILLINOIS, '.A. CORPORATON OF` ILLINOIS Loox i Applcatim filed .Tune 22,

The present invention relates generally to locks. More particularly the invention relates to that type of lock which comprises (l) a cylindrically shaped casing having a closed orsolid rear end and a central longitudinal bore extending through its front end; (2) a plug which is mounted rotatably in the bore in the casing and embodies a key slot in the front end th-ereof and an eccentrically positioned stud at its rear or inner end; and (3) a plurality of spring-pressed, keyoperable, plate tumblers which extend transversely through and are mounted slidabl in the plug and cooperate with longitudinal grooves in the` cylinder to hold the plug y against rotation when it is in itslocked or unlocked position and the key for the lock is removed from the plug.

One object of the invention is to provide a lock of this type in which the rear end of the casing is lprovided with an open-ended slot for astaple and supports a transversely extending bolt which is shiftable back and forth by the eccentrically positioned stud at the inner endof the plug and is adapted when the plug is rotated into its locked position by the key, to be shiftedby the stud into a position wherein it exten ds across the openended slot and through the staple opening and locks the cylinder and staple together.

Another object of the invention is to provide a lock of the type under consideration in which the cylindrically shaped casing is surrounded by a ring which is secured per manently against removal and serves to close the sides of the slot for the staple and to cover and render inaccessible the screw or pin which is usually used in locks of this type to prevent axial displacement of the plug relatively to the cylinder.

Another objectof the invention is to provide a lock of the last mentioned characterl in which the ring. is secured so that it is rotatable relatively to the casing and thus prevents the casing from being turned in an ati tempt to break the staple.` y y A further object ofthe invention is toprovide a lock of the cylinderand plug type which serves as a padlock and offers greater security than padlocks of ordinary construcpresent lock construction y of the lock;

1931. seriai No. 545,930.

tion in that the locking bolt is entirely pro-` tected by and confined wholly within the cylindrical casing.

` A still further object of the invention is to provide a lock which is generally of new and improved construction and may be manufactured at a low and reasonable cost.

. @ther objects of the invention and the various advantages and characteristics ofthe l will be apparent from a vconsideration of the following detailed description. y

The invention consists in the several novel features which are hereinafter set forth and are more particularly delined by claims at the conclusion hereof. y ln the drawing which accompanies and forms a part of this specification or disclosure and in which like numerals of reference denote correspondin g parts throughout the several views: l Y y Fig.`1 is a `perspective showing a lock embodying the invention applied to a staple and in use as a padlock;

Fig. 2 is a perspective of thevarious parts Fig. 3 is a side elevation, the ring for rendering inaccessible the plug holding screw being omitted for purposes of illustration;

` Fig. 4 is a rear view illustrating in detail the construction and arrangement of the open-ended slot in the rear end of the casing for receiving the staple;

.Figa 5 a vertical longitudinal section illustrating the manner in which the eccentrically positioned stud isconnected to operate the bolt for locking the staple and cylinder "together Fig. 6 is a transversesection on G-6 of Fig. 5; and Y F ig.' 7 is a vertical section through the lock on line 7-7 of Fig; 5. y The lockwhich forms the subject matter of the invention comprises a cylindrically shaped casing 7 and al plug 8 and 's adapted in conjunction with a staple or similar element to be used as a padlock. The staple which is shown in Fig. l of the drawing, has applied thereto the reference numeral 9 and is L-shaped in conformation. It is formed the line of metal and comprises a comparatively long leg 1() and a short leg 11. The long leg is provided with a pair of holes 12 through which screws or similar attaching devices may be inserted so as to secure the staple to the object which is to be locked by the lock. The short leg 11 extends at right angles to the long leg 10 and embodies an elongated aperture 13.

The cylindrically shaped casing 7 of the lock is formed of brass or yany other suitable metal. It embodies at the rear end thereof a wall 14 and has formed therein a longitudinal bore 15. The latter is disposed in the central portion of the casing and extends from the wall 14 through the front end of the casing. The wall 14 is formed integrally with the casing and serves to close the rear end of the bore. The plug 8 is mounted rotatably in the bore 15, has a longitudinal slot 16 for a key 17 and is provided at its outer or front end with a head 18. The head 18 lits in an annular recess 19 which is formed in the front end of the casing 7 and is slightly larger in diameter than the bore 15. The plug is locked against rotation in the casing by means of a plurality or set of key-operable plate tumblers 20. The latter are mounted a U-shaped frame 21 so that they are slidable transversely with respect to the plug. The frame 21 iits snugly in a transverse socket 22 in the central portion of the plug 8 and is similar in design and construction to that exhibited in Letters Patent of the United States No. 1,644,092. A spring (not shown) is associated with the frame and operates in conjunction with laterally projecting lugs on the tumblers, to force the tumblers outwardly so that the end parts thereof are disposed in a pair of diametrically opposite, longitudinal grooves 23 in the inner periphery of the casing 7. When the key 17 for the lock is inserted through the key slot 16, the tumblers are shifted so that the end parts thereof are withdrawn from the longitudinal grooves 23. In this position of the tumblers, the plug is free so that it may be rotated by the key from a locked position into an unlocked position. Then the key is withdrawn from the key-slot, the aforementioned spring which is associated with the frame forces the tumblers into locked relation with the grooves 23 and thus prevents rotation of the plug relatively to the casing. The plug is held against axial displacement in the bore 15 by means of a screw 24. This screw extends transversely through the rear end of the casing 7 and is provided at its inner end with a pin 25 which extends into an arcuate groove 26 in the rear end of the plug. v

The rear end of they casing 7 has formed therein an open-ended slot 27 This slot is located at one side of the axis or longitudinal center of the casing and is adapted to receive the small leg 11 of the staple 9, as illustrated in Fig. 1. To lock the small leg of the staple in the open-ended slot 27, a bolt 28 is provided. This bolt extends transversely with respect to the plug and is mounted slidably in a bore 29 in the rear end of the casing. The bore 29 passes through the inner face of the end wall 14 and intersects the open-ended slot 27. The central portion of the bore 29 faces and opens into the rear end of the bore 'l5 for the plug 8 and supports the bolt 28 so that it is shiftable into a position wherein it extends across the slot 27 and into the aperture 13 in the short leg of the staple and serves to lock the staple and casing together. The bolt V28 is shifted into and out of its operative position by means of a stud 30. The latter is eccentrically connected to the rear end of the plug 8 and fits in a notch 31 in the central portion of the bolt 28. lVhen the plug is rotated by the key from its unlocked position into its locked position, thc X stud 30 is displaced laterallyin one direction and shifts the bolt into its operative position wherein itextends across the slot 27. Then the plug is rotated by the key back to its unlocked position, the eccentrically positioned stud 3() is displaced laterally in the opposite direction and serves to shift the bolt into its inoperative position. The bolt 28 is preferably formed so that it embodies at one side thereof a flat face 28a. The rear end of the plug 8 is extended so as to fit against the face 28 and cooperate with the latter in preventing rotation of the bolt.

ln addition to the casing, plug and lockbolt, the lock comprises a ring` 32. This ring, as illustrated in the drawing, surrounds the casing and serves to cover and render inaccessible the screw 24 and to close the ends of the bore 29 and the sides of the open-ended slot 27. It is held permanently in place by means of a split spring wire band 33. The latter lits partially in an annular groove 34 in the inner periphery of the ring, and partially in an annular groove 35 in the outer periphery of the casing. rlhe ring is held by the band so that it is rotatable but cannot be displaced axially. As a result of this arrangement, it is impossible to turn the casing in an attempt to break or injure the staple.

In applying the lock to the staple, the plug 8 is first rotated into its unlocked position so as to shift the bolt 28 away fromthe openended slot 27. After rotating the plug into its unlocked position, the small leg` 11 of the staple is inserted into the open-ended slot 27 at the rear end of the casing by shifting or otherwise manipulating the casing towards the staple.l Thereafter, the plug is rotated -into its locked position by means of the key 17. Rotation of the plug into its locked position, as previously pointed out, operates through the medium of the eccentrically positioned stud 30 to shift the bolt 28 so that it extends across the slot 27 and through the t ino ias

aperture 13 in the small, end of the staple. Upon removal of the key from the plug, the casing and stapleare locked together' and A cannot again be disconnected Without the use as the locking bolt is entirely protected by,

and confined wholly within the cylindrically shaped casing 7.

The invention is not to be understood as restricted to the details set forth, since these may be modified Within the scope of the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is:

1. A lock comprising in combination, a cylindrical casing having a Vlong gitudinal bore extending through one end thereof and embodying an open-ended slot in its other end for receivinga staple, a tumblen equipped, key-operable plug mounted rotatably in the bore, an element extending through the central portion of the casing for holding the plug against axial displacement relatively to the casing, a bolt mounted movably in said other end of the casing and shiftable into and out of an operative position wherein it extends across the slot and through the staple, means operable by and in response to rotation of the plug, for shifting the bolt, and a ring extending around and secured permanently to the casing and arranged so that it covers and prevents access to the plugholding element.

2. Alock comprisingin combination a cylindrical casing having a longitudinal bore extending through one end thereof and embodying in its other end a longitudinal, openended slot for receiving a staple and a transverse bore intersecting the slot, a tumblerequipped, key-operable plug mounted rotatably in the longitudinal bore, ak bolt disposed in the transverse bore and slidable into and out of an operative position wherein it extends across the slot and through the staple, means operable by and in response to rotation of the plug for shifting the bolt, and a ring surrounding and secured permanently to the casing and arranged so as to close the ends of the transverse bore.

` 3. A lock comprising in combination a cylindrical casing having a longitudinal bore extending through one end thereof and embodying an open-ended slot extending transversely across its other end and adapted to receive a staple, a tumbler-equipped, key-operable plug mounted rotatably in the bore, a bolt mounted movably in the other end of the casing and shiftable into and out of an operative position wherein it extends across the slot and through the staple, means operable by and in response to rotation of the plug for shifting thebolt, and a ring surrounding and secured permanently to the casing and arranged so as to close the sides of the slot.

4. A lock comprising in combination, a cylindrical casing having a longitudinal bore extending through one end thereof and embodying in its other end `a longitudinal open-ended and open-sided slot for receiving a staple and a transverse bore intersecting the slot, a tumbler-equipped, key-operable plug mounted rotatably in the longitudinal bore, a bolt mounted slidably in the trans verse bore and arranged so that in response to rotation of the plug, it is shifted into and out of an operative position wherein it extends across the slot and through the staple, .and a ring extending around the 4casing and coextensive therewith so that it closes the ends of the transverse bore and the sides of the slot, said ring being secured to the casing so that it is rotatable but cannot Abe displaced axially relatively to the casing.

Signed at Chicago, Illinois, this 18th day of June, 1931.

LYLE B. SHINN. 

